Encapsulation of β-galactosidase from Aspergillus oryzae based on “fish-in-net” approach with molecular imprinting technique
By using tetraethylorthosilicate as a silica resource and triblock copolymer P123 as a template, the encapsulations of β-galactosidase with three different models of without protection, protection of protective agent and molecular imprinting technique pretreatment were accomplished through modified...
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Published in | Journal of molecular catalysis. B, Enzymatic Vol. 63; no. 1; pp. 75 - 80 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.04.2010
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | By using tetraethylorthosilicate as a silica resource and triblock copolymer P123 as a template, the encapsulations of β-galactosidase with three different models of without protection, protection of protective agent and molecular imprinting technique pretreatment were accomplished through modified “fish-in-net” route at pH 5.0. The highest enzymatic activity of β-galactosidase was gained by using pretreatment of molecular imprinting technique. Scanning electron microscopy (SEM) images showed that the matrix of encapsulated β-galactosidase was made of an aggregation of uniform microspheres of 200–300
nm, and N
2 adsorption/desorption isotherms demonstrated that the matrix of encapsulated β-galactosidase possessed average Brunauer–Emmett–Teller (BET) pore size of 27
Å and narrow pore size distribution. More importantly, compared with encapsulated β-galactosidase without protection, the hydrolytic activity of encapsulated β-galactosidase pretreated by molecular imprinting technique was about 3 times and 1.8 times, while the enzymatic activity of encapsulated β-galactosidase with the protection of protective agent increased only 1.3-fold when lactose and o-nitrophenyl-β-
d-galactopyranoside (ONPG) were used as substrates, respectively. The protective effect of molecular imprinting technique pretreatment on the enzymatic activity after encapsulation was better than that by protective agent. |
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ISSN: | 1381-1177 1873-3158 |
DOI: | 10.1016/j.molcatb.2009.12.012 |